There are 7 purple beads and 6 green beads in a bag. One bead is selected at random. What is the probability of NOT selecting a purple bead?
- 7 purple beads
- 6 green beads
Choose the best answer.
Note
For a “not” event, count the outcomes outside the named event. This is the complement of the event.
- The complement of selecting purple is selecting any other color.
- There are 6 non-purple beads out of 13 total beads.
- So the probability is 6/13 = 6/13.
- A complement probability can also be found by doing 1 minus the probability of the event.
The correct answer is 6/13. This matches the calculation or definition, so students should focus on the reasoning rather than only memorizing the final value.